Breaking News: Grepper is joining You.com. Read the official announcement!

redux react js documentation

Open Ox answered on September 12, 2022 Popularity 10/10 Helpfulness 2/10

answer redux react js documentation

redux react js documentation

Comment

import { createStore } from 'redux'

/**
 * This is a reducer - a function that takes a current state value and an
 * action object describing "what happened", and returns a new state value.
 * A reducer's function signature is: (state, action) => newState
 *
 * The Redux state should contain only plain JS objects, arrays, and primitives.
 * The root state value is usually an object. It's important that you should
 * not mutate the state object, but return a new object if the state changes.
 *
 * You can use any conditional logic you want in a reducer. In this example,
 * we use a switch statement, but it's not required.
 */
function counterReducer(state = { value: 0 }, action) {
  switch (action.type) {
    case 'counter/incremented':
      return { value: state.value + 1 }
    case 'counter/decremented':
      return { value: state.value - 1 }
    default:
      return state
  }
}

// Create a Redux store holding the state of your app.
// Its API is { subscribe, dispatch, getState }.
let store = createStore(counterReducer)

// You can use subscribe() to update the UI in response to state changes.
// Normally you'd use a view binding library (e.g. React Redux) rather than subscribe() directly.
// There may be additional use cases where it's helpful to subscribe as well.

store.subscribe(() => console.log(store.getState()))

// The only way to mutate the internal state is to dispatch an action.
// The actions can be serialized, logged or stored and later replayed.
store.dispatch({ type: 'counter/incremented' })
// {value: 1}
store.dispatch({ type: 'counter/incremented' })
// {value: 2}
store.dispatch({ type: 'counter/decremented' })
// {value: 1}

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: redux.js.org

Tags: documentation javascript redux

Link to this answer
Share Copy Link

Contributed on Sep 12 2022

Open Ox

0 Answers Avg Quality 2/10

redux react js documentation

Contents

More Related Answers

redux react js documentation

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.